Lever actuated rod bending tool with work clamping means



NOV. 8, 1955 J, M, F, OYEN 2,722,858

LEVER ACTUATED ROD BENDING .TOOL WITH WORK CLAMPING MEANS Filed June 9, 1952 Ti; kwa? 26 United States Patent .-LEVER. ACTUA'PED .IRODvBiENDlNG 'FOOL yWITH WORK -GIJAMRING `MEANS "JohnM.'F.OyenySantFranciscm Calif. Application-.Innes assz, sexismo-.enum l scisma. (Cifsi-a-s) `into the required hook=like shape 'around the :edges of the beam rflanges but"this proceduref'is slow and'difiicult and rod bending tools have been designed for accomplishing this purpose.

This invention pertains to an improved rod bending tool and it is the object of the invention to provide a tool that is easily and quickly placed on and removed from a beam ange and which will embrace and bend a rod resting against the flange.

A further object is to provide a tool of this kind with means to clamp it to the flange and with a single lever operable first to effect clamping of the tool, then bending of the rod and then releasing of the clamping means.

Further and more specific objects and advantages of the invention are made apparent in the following specilication wherein the invention is described in detail by reference to the accompanying drawings.

In the drawings:

Fig. 1 is a side elevation of a rod bending tool embodying the present invention with parts thereof illustrated in section,

Fig. 2 is a front elevation of the same tool,

Fig. 3 is a sectional view taken on the line III- Ill of Fig. 1,

Fig. 4 is an enlarged sectional view taken on the line IV-IV of Fig. 3,

Fig. 5 is a diagrammatic view illustrating four positions of the rod bending roller and showing the progressive bending of the rod thereby, and

Fig. 6 is a diagrammatic view illustrating the manner in which a rod spans and is bent to embrace the flanges of two beams.

Referring now to the drawings in detail, the rod bending tool is shown as having a body member made up of a rectangular tubular part 8 and spaced plates 9 which extend forwardly from this member, then downwardly and then inwardly to a point beneath the tubular part to provide what is in effect a C-clamp. The tubular part 8 contains a jaw 10 resiliently urged downwardly by a spring 11 and having an upwardly extending stern 12 extending through a top plate 13 welded to the top of the body member.

A pair of screws 14 best shown in Fig. 4 extend through opposite sides of the body member 8 and have ends which project into slots 15 in the jaw 10 in order to limit its vertical reciprocal movement. Thumb screws 16 are threadedly mounted in the lower end of the plates 9 to adjust the size of the clamp-like body member to beam flanges of different thicknesses.

A forked lever 18 is supported for swinging movement 2,722,858 "Patented Nov. 8, 1.955

between the plates 9 as by "pivot screws 19 and carries Va grooved Yroller 20 .'for engagingand bending -a `rod and also aroller 21`for releasing -rthe pressure .of "fthe 'spring '12 which 'serves'thejpurpose of holding "the clamp "ice in place 'on a'beam ange. The roller 21'acts in cooperation with a lever V22 which is pivoted 'as i'by `a pin 23 to the body member 'and embracing the stem '12 of'the jaw member .10. A nut is 'fitted on `the upper end of the stem 12andholds awasher24in engagement with the'top ofthe'lever22. `'Consequently whenthelever 18 is swung to the left as viewed in Fig. l, the roller 21 thereon engages Athe lower `edge .of the lever 22 'raising this lever to the broken'iline position shown `where Ythe roller 21 lodges inan;indentation Z5 'of 'the lever. This yholds the 'lever Ain its raised position vto 'compress the lspring 1'1 so that v`it doesnot urge'the jaw A1'0 Ldown- 4wardly.

In XFig. l `of the drawings, a `structural beam of T- shaped cross-sectioniis shown vin broken lines ,at '26 and a rod shown in broken'lines at"27 is .illustrated as overlying the top of 'the Astructura'1l-member in readiness to nhave its end bent Yaroundoneo'f the `flanges thereof. The

rod 27 is valso shown `in 'broken lines in Fig. 4 and in 'thisviewthe jaw I10 is shown as having a central recess 28 overlying the rod. The tubular part 8 of the"bo`dy member has corresponding recesses as shown at 29 in Fig. 1. Teeth or serrations 30 are preferably provided on the bottom of the jaw member to aid in holding it against slipping on the ilange of the beam 26.

In operation the bending tool is first placed over the flange of the beam with which it is to be used as illustrated in Fig. l with the lever 18 in the left hand position so that the jaw 11 will be raised out of contact with the beam. The thumb screws 16 are then turned up until they engage the opposite side of the beam flange and are then preferably reversed or retracted about a half turn so that the tool may easily be slipped onto and olf of the ange. Then when the rod, such as indicated at 27, has been placed in position, the tool may be slipped over the rod and beam ange. At this time the lever 18 is moved toward the right. During the first part of its movement the roller 21 is withdrawn from beneath the lever 22 so that the spring 11 urges the jaw 10 into gripping contact with the beam ange. Further movement of the lever 18 about its pivotal support 19 causes the grooved bending roller 20 to swing through the four positions shown at 20a, 2Gb, 20c and 20d in Fig. 5 and in doing so to bend the rod 27 around the ange of the beam 26 as illustrated in dotted lines in the same figure. Upon return movement of the. lever, the roller 21 again engages beneath the lever 22 to compress the spring 11 and withdraw the jaw 10 from its contact with the beam flange so that the bending tool can easily be removed.

Fig. 6 shows a conventional arrangement of two of the beams 26 with a rod 27 spanning the space between them. Conventionally one end of all of the rods is preformed to a hook-like shape as indicated at 32 and the opposite end projects beyond one of the beam flanges as shown in full lines so that the bending tool of the present invention may be applied and operated to bend the end of the rod to the dotted line position shown in Fig. 6.

From the foregoing description, it will be apparent that the bending tool with the lever 18 in its upright position is easily slipped over a beam ange with the reinforcing rod received in the opening which extends through the jaw 28. A single swinging movement of the lever 18 rst causes the tool to be securely clamped onto the beam flange and then causes bending of the rod about to be clamped. Similarly a reverse movement of the handle 18 releases the tool for easy removal and leaves it in condition for application to the beam ange for bending another rod.

I claim:

1. A tool for bending a rod over the edge of a beam ange or the like which comprises a clamp including spaced beam engaging jaws, resilient means to urge one of said jaws toward the other and into clamping position against the flange, a lever pivoted to the clamp,

means to engage a rod overlying the ange and to bend the rod about the edge of the flange upon movement of the lever in one direction, and means actuated upon movement of the lever in the opposite direction to retract the jaw free of its clamping engagement with the ange.

2. A tool for bending a rod over the edge of a beam flange or the like which comprises a clamp adapted to overlie the rod and embrace an edge of the lange, a jaw mounted for reciprocation in the clamp, a spring normally urging the jaw into clamping position, a retracting lever pivoted to the clamp and connected with the jaw for retracting the jaw, a bending lever pivoted to the clamp, a grooved roller carried by the bending lever and engageable with the rod to bend the rod around the edge of the ange upon swinging movement of the bending lever in one direction, and means on the bending lever to engage the retracting lever and retract the jaw upon movement of the bending lever in the opposite direction.

3. A tool for bending a rod over the edge of a beam flange or the like which comprises a clamp adapted to overlie the rod and embrace an edge of the tlange, a jaw mounted for reciprocation in the clamp, a spring normally urging the jaw into clamping position, a retracting lever pivoted to the clamp and engaging the jaw for retracting the jaw in opposition to the spring pressure thereon, said retracting lever having an indentation formed therein, a bending lever pivoted to the clamp, a roller carried by the bending lever and engageable with the rod to bend it around the edge of the flange upon swinging movement of the bending lever in one direction, and means on the bending lever to engage the retracting lever and retract the jaw upon movement of the bending lever in the opposite direction, said means registering with said indentation to hold the jaw in its re tracted position.

References Cited in the file of. this patent UNITED STATES PATENTS 605,855 Colborne June 21, 1898 1,167,983 Davis et al Jan. 1l, 1916 2,192,428 Bernhard Mar. 5, 1940 2,538,149 Fannen et al. Jan. 16, 1951 2,554,350 Vines May 22, 1951 2,616,316 Dupre Nov. 4, 1952 

